Programming and Relearning
ENCRYPTED CODE REGISTRATION METHODRequired Special Tool:
MB991502: Scan Tool (MUT-II)
CAUTION: Because registering the encrypted codes is done after all previously-registered codes have been erased, you should keep all of the ignition keys that have already been registered accessible.
If the ignition key, Immobilizer-ECU, ECM
If an attempt is made to start the engine with an unregistered ignition key, cranking occurs, but fuel supply is cut off to disable the engine. In approx. 10 seconds, the theft-alarm indicator will blink for approx. 30 seconds.
NOTE: ECM
POINTS TO NOTE DURING OPERATION
If none of the functions can be used, check the diagnostic trouble codes, and after carrying out any necessary repairs, repeat the operation.
If an incorrect password is input five times in a row, the immobilizer-ECU judges that an unauthorized operation is being attempted. Start-prevention mode will be set, and engine operation will stop and all special functions will be disabled. If the ignition switch is turned to "ON" position and left in that position for approximately 20 minutes, "Unauthorized operation, start-prevention mode" will be cancelled.
KEY ID REGISTER
All ignition keys can be registered with scan tool MB991502. Additional ignition keys can be registered with or without scan tool MB991502.
If an ignition key is registered using scan tool MB991502, no registered ignition keys must be lost.
Registration with scan tool MB991502
CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.
NOTE: Using the key ID register function will cause all key IDs that have been previously registered in the immobilizer-ECU to be erased. All keys need to be registered. Those which have been registered before should be on hand before using this function.
NOTE: If registering more than one key, do not disconnect scan tool MB991502 hallway through the registration process.
NOTE: After registering key IDs, check that the engine can be started using all of the keys that have been registered. If the engine will not start, refer to immobilizer System Diagnosis.
1. Connect scan tool MB991502 to data link connector (16 pin).
2. Turn the ignition switch to "ON" position.
3. At "System Select", press "YES".
4. Select "Immobilizer", press "YES".
Special Tools:
5. Select "Special Func" press "YES".
6. Select "key ID registr," press "YES".
If DTC 11 exists," Can't execute" will be displayed. Check for DTC 11.
7. Input the password. Use the "UP" and "DOWN" keys to change the current password digit to a value between 0 and 9. Use the "LEFT" and "RIGHT" keys to move to a different password digit. Press the "YES" key to accept the password.
NOTE: Four separate digits must be input to make up the password.
If an incorrect password is input five times in a row, this screen is displayed and the Immobilizer-ECU switches to unauthorized operation, start-prevention mode.
8. Press the "YES" key to start key ID registration.
9. This will be displayed when the key ID registration is successful. If an error occurs during key ID registration, the message "Can't execute" will be displayed. If the key has already been registered, "Key ID has been registered" will be displayed.
10. The number of keys currently registered will be displayed. To register an additional key, replace the ignition key with the next key to be registered within five seconds and then press the "YES" key. Key ID registration screen will be displayed, then register another key.
NOTE: A maximum of eight different keys can be registered.
If key ID registration is complete, press the "NO" key.
11. This completes the registration operation. Turn the ignition switch to the "LOCK" (OFF) position and leave it off for approximately ten seconds.
12. Check that the engine can be started with each of the ignition keys.
13. Check that the immobilizer system DTC and MFI system DTC did not set.
14. Turn the ignition switch to the "LOCK" (OFF) position.
15. Disconnect scan tool MB991502.
Registration of additional keys with the scan tool
An additional key is registered with the MUT-II while keeping all existing key data.
CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.
NOTE: To register additional keys with the MUT-II, no registered keys must be lost.
1. Connect scan tool MB991502 to data link connector (16 pin).
2. Turn the ignition switch to the "ON" position.
3. At "System Select," press "YES".
4. Select "Immobilizer", press "YES".
5. Select "Special Func," press "YES".
6. Select "Add key ID reg," press "YES".
If DTC 11 exists," Can't execute" will be displayed. Check for DTC 11.
7. Press the "YES" key to start key ID registration.
8. This will be displayed when the add key ID registration is successful. If an error occurs during key ID registration, the message "Can't execute" will be displayed. If the key has already been registered, "Key ID has been registration" will be displayed.
9. The number of keys currently registered will be displayed. To register an additional key, replace the ignition key with the next key to be registered within five seconds and then press the "YES" key. Key ID registration screen will be displayed, then register another key.
NOTE: A maximum of eight different keys can be registered.
If key ID registration is complete, press the "NO" key.
10. This completes the registration operation. Turn the ignition switch to the "LOCK" (OFF) position and leave it off for approximately ten seconds.
11. Check that the engine can be started with each of the ignition keys.
12. Check that the immobilizer system DTC and MFI system DTC did not set.
13. Turn the ignition switch to the "LOCK" (OFF) position.
14. Disconnect scan toot MB991502.
Registration of additional keys without using the scan tool
Operate two registered ignition keys by the following procedure, call additional registration mode for the immobilizer ECU, then register an additional ignition key by operating it. Additional ignition keys can be registered without using the MUT-II by operating two ignition keys that already have been registered to the vehicle and operating an additional key to be registered. (A maximum of eight ignition keys can be registered.)
1. The ignition switch is "ON" by using he first key (KEY A) which has already been registered to the vehicle.
2. If the first key (KEY A) is correct, the immobilizer-ECU begins the condition warning the second key (KEY B) which has already been registered to the vehicle. The ignition switch has been on the "ON" position for longer than 5 seconds so that enters the condition of waiting the second key (KEY B).
3. After the ignition switch is "LOCK" (OFF), it is "ON" by the second key (KEY B) which has already been registered to the vehicle.
The second key (KEY B) must be turned on within 7 seconds of removing the first key.
4. If the second key (KEY B) is correct, the immobilizer-ECU enters the addition entry mode.
And the theft alarm indicator light blinks approx. twice a second.
5. After the theft alarm indicator light blinks, the ignition switch is "OFF" (LOCK). And it is "ON" by using the new transponder key. The time which the key can be registered is limited than 30 seconds after the indicator blinks.
6. The time which the key can be registered is limited less than 30 seconds after the theft alarm indicator blinks.
7. The immobilizer-ECU controls as follows by the new key condition.
8. To continue to register another key, set the ignition switch to "LOCK" (OFF) position, and turn the ignition key to be registered "ON" within seven seconds. (the maximum of 8 keys can be registered to each vehicle. If the 9th key registers, the registration will be refused.)
9. The additional registration mode is terminated when any of the following conditions is met:
- The ignition key is "ON" position keeps more than 30 seconds. (the time out of addition entry mode)
- The engine control relay is off after key is turned to the "LOCK" (OFF) position.
- Start the communication with scan tool
10. The addition registered key can start engine, after the key turned off and the engine control relay is off.